* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #f3f4f6;
  color: #111827;
}

a {
  color: #4f46e5;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  cursor: pointer;
  font: inherit;
}

input {
  font: inherit;
}

/* Login */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #312e81 100%);
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.login-card h1 {
  margin: 0;
  font-size: 24px;
}

.login-card p {
  margin: 0 0 8px;
  color: #6b7280;
}

.login-card label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
}

.login-card input {
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
}

.login-card button[type="submit"] {
  margin-top: 8px;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: #4f46e5;
  color: #fff;
  font-weight: 700;
}

.login-card button[type="submit"]:disabled {
  opacity: 0.7;
}

.login-error {
  color: #dc2626;
  font-size: 14px;
}

.hidden {
  display: none !important;
}

/* Layout */
.admin-shell {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 240px;
  background: #1a1a2e;
  color: #fff;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.admin-brand {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 32px;
}

.admin-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.admin-nav a {
  color: rgba(255, 255, 255, 0.75);
  padding: 10px 12px;
  border-radius: 8px;
  text-decoration: none;
}

.admin-nav a.active,
.admin-nav a:hover {
  background: rgba(79, 70, 229, 0.25);
  color: #fff;
  text-decoration: none;
}

.admin-sidebar-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.admin-sidebar-footer button {
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: transparent;
  color: #fff;
  border-radius: 6px;
  padding: 6px 10px;
}

.admin-main {
  flex: 1;
  padding: 24px;
  min-width: 0;
}

/* Page */
.page-card {
  background: #fff;
  border-radius: 16px;
  border: 1px solid #e5e7eb;
  padding: 24px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
  flex-wrap: wrap;
}

.page-header h2 {
  margin: 0;
  font-size: 22px;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-header-actions span {
  color: #6b7280;
  font-size: 14px;
}

.page-message,
.page-error,
.empty-cell {
  padding: 24px;
  text-align: center;
  color: #6b7280;
}

.page-error {
  color: #dc2626;
}

.btn-primary,
.btn-secondary {
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
}

.btn-primary {
  background: #4f46e5;
  color: #fff;
}

.btn-secondary {
  background: #eef2ff;
  color: #4338ca;
  border: 1px solid #c7d2fe;
}

.btn-primary:disabled,
.btn-secondary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-danger {
  border: none;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 600;
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.btn-danger:hover {
  background: #fee2e2;
}

.btn-danger:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid #f3f4f6;
  text-align: left;
  font-size: 14px;
}

th {
  background: #f9fafb;
  color: #374151;
  font-weight: 700;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.detail-item {
  background: #f9fafb;
  border-radius: 10px;
  padding: 12px 14px;
}

.detail-item label {
  display: block;
  font-size: 12px;
  color: #6b7280;
  margin-bottom: 4px;
}

.detail-item span {
  font-weight: 600;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 14px;
}

@media (max-width: 768px) {
  .admin-shell {
    flex-direction: column;
  }

  .admin-sidebar {
    width: 100%;
  }
}